Flush the Xlib buffer after setting gamma.HEADmaster

Before I added the dirty tracking, this wasn't necessary because it filled
the buffer very frequently.  But now, with it optimizing out calls, I was
seeing mysterious lag.

1 files changed, 1 insertions, 0 deletions

diff --git a/ggamma.c b/ggamma.c
index de0192e..1e3ef3c 100644
--- a/ggamma.c
+++ b/ggamma.c
@@ -121,6 +121,7 @@ int main(int argc, char *argv[]) {
 			
 	void flush(void) {
 		XRRSetCrtcGamma(display, crtc, gamma);
+		XFlush(display);
 	}
 	GtkWidget *curve;